pH Paper and Buffers
Thermo Scientific™ Orion™ pH Buffer Bottles
Perform accurate, reproducible pH calibrations with these color-coded buffer bottles.
Traceable™ ISO 17034 (formerly ISO Guide 34) Color-Coded CRM pH Buffers (Certified Reference Material), Fisherbrand™
Performs accurate, reproducible pH calibrations with color-coded bottles. Fisherbrand™ Traceable, Color-Coded buffers are Certified Reference Material pH Buffers.Compatible with all makes of pH instruments and electrodes.
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Orion™ All-in-One™ pH Buffer Kits
Work with ease using this color-coded pH buffer kit that includes three buffers, storage solution and a storage bottle.
Color Coded pH Buffer Solution Tested at 20°C, Reagecon™
Use color coded pH buffers for ease of use. Reagecon™ Color Coded pH Buffer Solutions Tested at 20°C are certified and NIST traceable.
Cytiva Whatman™ pH Indicator Papers, CF Strips
Provides an extremely clear and accurate visual pH value using four different segments of dye-impregnated indicator papers. Whatman™ pH Indicator Papers, CF Strips use dyes that are chemically bonded to the paper and cannot be leached into solution.
Buffer Solution, pH 10.00, Blue, Mercury Free, Reagecon™
Certified by an ISO 17025 accredited method and NIST traceable. Reagecon™ Buffer Solution, pH 10.00, Blue, Mercury Free is tested at 25°C to an accuracy level of ±0.01. This calibration and control buffer is specially formulated to ensure its stability, even after opening the bottle.
Cytiva Whatman™ Lead Acetate Test Paper Dispenser
Dispenser for rapid qualitative test paper to detect hydrogen sulfide
Technical pH Buffer Solutions, METTLER TOLEDO™
Provides a reliable all-around pH buffer. Mettler Toledo™ Technical pH Buffer Solution are specified to two decimal places and are traceable to NIST standards. Color-coded solution comes in a handy 250mL plastic bottle with no-fuss labels.
Thermo Scientific™ Orion™ pH Buffer Individual Use Pouches
Ensure fresh, ready-to-use standards for pH calibration with these pH Buffer individual use pouches.
Buffer Solution, pH 4.00, Red, Reagecon™
Certified by an ISO 17025 accredited method and NIST traceable. Reagecon™ Buffer Solution, pH 4.00, Red is tested at 20°C to an accuracy of ±0.01. This calibration and control buffer is specially formulated to ensure its stability, is color coded and features a twin-neck bottle design.
Buffer Solution, pH 10.00, Blue, Reagecon™
Certified by an ISO 17025 accredited method and NIST traceable. Reagecon™ Buffer Solution, pH 10.00, Blue is tested at 20°C to an accuracy of ±0.01. This calibration and control buffer is specially formulated to ensure its stability, is color coded and features a twin-neck bottle design.
Cytiva Whatman™ Litmus Blue Test Paper
Impregnated with a mixture of pH indicators, acid-alkali litmus papers assume a color specific to sample pH upon contact with a sample. Whatman™ Litmus Blue Test Paper provides rapid determination of pH values and has a variety of applications in laboratories and industry.
Cytiva Whatman™ Specialized Test Paper
Book, starch iodide.
Cytiva Whatman™ pH Indicator, 1.0 to 11.0 Range, 10 books of 10 strips, pH Indicators and Test Papers
Accurate for a wide range of routine pH testing
pH 12.00 Buffer Solution at 25°C, Reagecon
Tested, certified, NIST traceable, and shelf-stable buffer solution.
pH 4.00 Color-Coded Buffer Solution at 25°C in Bag-in-Box, Reagecon
Easy-to-use, tested, certified, NIST traceable, and shelf-stable, color-coded buffer solution.
pH papers, pH strips, pH sticks and pH test kits are used in laboratory, industrial and educational environments to qualitatively assess pH levels or monitor acid-base titrations in a range of sample types. pH buffer reference standards are used for the accurate calibration of pH meters and monitors for far more precise and quantitative pH measurement.
pH test papers are supplied either as rolls, tear-off strips, or sticks. They are impregnated with indicator dyes which change colour when dipped into the solution under test. In some products, the indicator dyes are covalently linked to the cellulose fibres to avoid bleed-out (leaching) and contamination of the test samples.
Some pH papers indicate simple acid or base conditions with a single red-blue colour change (also called litmus papers). Universal pH papers and strips contain a mix of indicator dyes which cover a range of pH values up to and including 0 to 14 in a single test. The observed colour change is checked against a comparison chart normally supplied with the papers.
Alternatively, for accurate assessment of pH, standard (reference) pH buffers are manufactured to very high degrees of precision and are used for the quantitative calibration of pH meters, electrodes and other electrochemical sensors. Standard buffers are:
- Typically supplied at fixed values of pH4.01, pH7.00 and pH10.01
- May be colour-coded for easy and quick identification
- Certified to their nominal pH and accuracy at a specified temperature (typically 20°C)
- Supplied as ready-to-use solutions or concentrates
- Contain antifungals for extended shelf life